Jasin, M.R., Setyanto, D.B., Hadinegoro, S.R., Lisnawati, L., Gayatri, P. and Kurniati, N. 2015. Efficacy of sputum induction from lower respiratory tract in children. Paediatrica Indonesiana. 55, 2 (Apr. 2015), 101-8. DOI:https://doi.org/10.14238/pi55.2.2015.101-8.